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Home >> Chevrolet >> 2001 >> Metro >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 1.3L >> Diagnostic Tests >> DTC P0601: Control Module Read Only Memory (ROM) >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing powertrain diagnostic system check, go to next step.
  2. Using scan tool, clear DTC information. Turn ignition on to initialize PCM. Start engine. Operate vehicle. If necessary, repeat road test. If vehicle does not start, crank engine so that DTC P0601 can set. If DTC resets, go to next step. If DTC does not reset, see DIAGNOSTIC AIDS .
  3. Turn ignition off. Replace PCM. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After replacing PCM, go to next step.
  4. Turn ignition on, with engine off. Using scan tool, clear DTC information. Operate vehicle within FREEZE FRAME/FAILURE RECORDS data conditions that set DTC. Check for DTCs. If no DTCs are stored, repair is complete. If any DTCs are stored, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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